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The 'direct comparison': a new American method for progeny testing of dairy bulls


, : The 'direct comparison': a new American method for progeny testing of dairy bulls. Revue de l' Agriculture 30(3): 629-653

The direct comparison method of progeny testing put forward by Henderson is described in detail and different mathematical models of sire/herd, group/sire/herd and group/sire/herd/cow comparisons are studied and illustrated by examples.

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